19974442952015 has 16 divisors (see below), whose sum is σ = 24570848546496. Its totient is φ = 15579079507200.

The previous prime is 19974442951963. The next prime is 19974442952063. The reversal of 19974442952015 is 51025924447991.

It is not a de Polignac number, because 19974442952015 - 2¹² = 19974442947919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33231491 + ... + 33827220.

It is an arithmetic number, because the mean of its divisors is an integer number (1535678034156).

Almost surely, 2^{19974442952015} is an apocalyptic number.

19974442952015 is a deficient number, since it is larger than the sum of its proper divisors (4596405594481).

19974442952015 is a wasteful number, since it uses less digits than its factorization.

19974442952015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67060210.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 19974442952015 in words is "nineteen trillion, nine hundred seventy-four billion, four hundred forty-two million, nine hundred fifty-two thousand, fifteen".